Abstract:
Ca
1-3xLn
2xTiO
3(x=0.13, 0.20;Ln=La, Nd, Sm) ceramics were prepared by solid state reaction method.The influences of Ln
3+ content on phase composition, microstructure and microwave dielectric properties of Ca
1-3xLn
2xTiO
3 ceramics were investigated.The results show that single orthogonal perovskite structure phase was formed except that a little secondary phase Sm
2Ti
2O
7 was detected by XRD analysis when x=0.20 and Ln=Sm.Dielectric constant(τ
f) and temperature coefficient of resonant frequency(τ
f) decreased with the increasing Ln
3+ content.The Ca
1-3xLn
2xTiO
3 ceramics with perferable microwave dielectric properties were obtained when x=0.13: ε=120, Qf=10700GHz, τ
f=304×10
-6/℃(Ln=La);